U.S. patent application number 15/218128 was filed with the patent office on 2018-01-25 for coaxial connector assembly.
The applicant listed for this patent is DELPHI TECHNOLOGIES, INC.. Invention is credited to Geronimo Mauricio De La Torre, Michael Jerry Demonica, Cory R. Ensley, Crystal F. Krompegel, John R. Morello, Matthew L. Penn, James M. Rainey.
Application Number | 20180026408 15/218128 |
Document ID | / |
Family ID | 59384039 |
Filed Date | 2018-01-25 |
United States Patent
Application |
20180026408 |
Kind Code |
A1 |
Ensley; Cory R. ; et
al. |
January 25, 2018 |
COAXIAL CONNECTOR ASSEMBLY
Abstract
A coaxial connector assembly is described herein. The coaxial
connector assembly includes an inner contact that is configured to
terminate a center conductor of a coaxial cable, an insulative
inner sleeve holding the inner contact, a tubular outer contact
surrounding the inner sleeve and the inner contact, said outer
contact configured to terminate a shield braid of the coaxial cable
and an insulative cylindrical outer sleeve defining a central
cavity extending longitudinally therethrough in which said outer
contact is disposed. The cavity has an opening configured to
receive a corresponding coaxial connector. A lip on a forward end
of the outer sleeve extends into the opening such that a forward
edge of the outer contact is not exposed within the opening. The
coaxial connector assembly may be configured to meet the FAKRA
connector standards.
Inventors: |
Ensley; Cory R.; (Canfield,
OH) ; Morello; John R.; (Warren, OH) ;
Demonica; Michael Jerry; (Cortland, OH) ; Penn;
Matthew L.; (Cortland, OH) ; Rainey; James M.;
(Warren, OH) ; De La Torre; Geronimo Mauricio;
(Warren, OH) ; Krompegel; Crystal F.; (Canfield,
OH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
DELPHI TECHNOLOGIES, INC. |
Troy |
MI |
US |
|
|
Family ID: |
59384039 |
Appl. No.: |
15/218128 |
Filed: |
July 25, 2016 |
Current U.S.
Class: |
439/578 |
Current CPC
Class: |
H01R 24/545 20130101;
H01R 13/631 20130101; H01R 13/506 20130101; H01R 13/6456 20130101;
H01R 24/38 20130101; H01R 13/424 20130101 |
International
Class: |
H01R 24/38 20060101
H01R024/38; H01R 13/631 20060101 H01R013/631; H01R 13/506 20060101
H01R013/506 |
Claims
1. A coaxial connector assembly, comprising: an inner contact
configured to terminate a center conductor of a coaxial cable; an
insulative inner sleeve holding the inner contact; a tubular outer
contact surrounding the inner sleeve and the inner contact, said
outer contact configured to terminate a shield braid of the coaxial
cable; and an insulative cylindrical outer sleeve defining a
central cavity extending longitudinally therethrough in which said
outer contact is disposed, wherein said cavity has an opening
configured to receive a corresponding coaxial connector and wherein
a lip on a forward end of the outer sleeve extends into the opening
such that a forward edge of the outer contact is not exposed within
the opening.
2. The coaxial connector assembly according to claim 1, wherein the
lip is angled inwardly toward the opening.
3. The coaxial connector assembly according to claim 1, wherein the
outer contact defines a lock tab radially protruding from an outer
surface of the outer contact and wherein the outer sleeve defines
an aperture extending radially from the cavity to the outer surface
of the outer sleeve in which this lock tab is received.
4. The coaxial connector assembly according to claim 1, wherein the
outer contact defines a pair of lock tabs, each lock tab of the
pair of lock tabs protruding from opposite sides of an outer
surface of the outer contact and wherein the outer sleeve defines a
pair of apertures, each aperture of the pair of apertures extending
radially from the cavity to the outer surface through opposite
sides of the outer sleeve in which one of the pair of lock tabs is
received.
5. The coaxial connector assembly according to claim 4, wherein the
outer sleeve defines a pair of longitudinal slots, each slot of the
pair of slots extending radially through opposite sides of the
outer sleeve and each slot intermediate the pair of apertures, said
pair of slots configured to allow sides of the outer sleeve to flex
outwardly.
6. The coaxial connector assembly according to claim 5, further
comprising a connector housing in which the outer sleeve is
received and wherein the connector housing inhibits the sides of
the outer sleeve from flexing outwardly.
7. A female coaxial connector assembly, comprising: an inner
contact configured to terminate a center conductor of a coaxial
cable; an inner sleeve formed of a first dielectric material and
holding the inner contact; a tubular outer contact formed from a
flat work piece and surrounding the inner sleeve and the inner
contact, said outer contact configured to terminate a shield braid
of the coaxial cable; and a cylindrical outer sleeve formed of a
second dielectric material and defining a longitudinal cavity
extending therethrough, wherein said outer contact is disposed
within said cavity, wherein said cavity has an opening configured
to receive a corresponding male coaxial connector, and wherein a
lip on a forward end of the outer sleeve angled inwardly toward the
opening and extending into the opening such that a forward edge of
the outer contact is not exposed within the opening.
8. The female coaxial connector assembly according to claim 7,
wherein a lock tab is formed in the flat work piece, said lock tab
radially protruding from the outer contact and wherein the outer
sleeve defines an aperture that extends radially from the cavity to
the outer surface of the outer sleeve in which this lock tab is
received.
9. The female coaxial connector assembly according to claim 7,
wherein a pair of lock tabs is formed from the flat work piece,
each lock tab of the pair of lock tabs protruding from opposite
sides of the outer contact, wherein the outer sleeve defines a pair
of apertures, each aperture of the pair of apertures extending
radially from the cavity to the outer surface through opposite
sides of the outer sleeve in which one of the pair of lock tabs is
received, and wherein a rearward edge of the lock tab engages a
forward edge of the aperture, thereby inhibiting removal of the
outer contact from the outer sleeve.
10. The female coaxial connector assembly according to claim 9,
wherein the outer sleeve defines a pair slots extending
longitudinally from a rearward flange of the outer sleeve, each
slot of the pair of slots extending radially through opposite sides
of the outer sleeve and each slot intermediate the pair of
apertures, said pair of slots configured to allow sides of the
outer sleeve to flex outwardly when a forward surface of the lock
tabs engage the rearward flange of the outer sleeve.
11. The female coaxial connector assembly according to claim 10,
further comprising a connector housing in which the outer sleeve is
received and wherein the connector housing inhibits the sides of
the outer sleeve from flexing outwardly, thereby retaining the pair
of lock tabs within the pair of apertures.
Description
TECHNICAL FIELD OF THE INVENTION
[0001] The present invention relates generally to electrical
connectors and, more particularly, to a female coaxial connector
assembly.
BACKGROUND OF THE INVENTION
[0002] Coaxial cable connector assemblies have been used for
numerous automotive applications, such as global positioning
systems (GPS), infotainment systems, and air bag systems. Coaxial
cables typically consist of an outer shield conductor, an inner
center conductor, a dielectric, and an insulation jacket. The outer
conductor and the inner conductor of the coaxial cable often
electrically interface with a mating coaxial cable through socket
and plug connectors. Such conventional coaxial cable connectors are
known in the art.
[0003] In order to standardize various types of connectors and
thereby avoid confusion, certain industry standards have been
established. One of these standards is referred to as FAKRA. FAKRA
is the Automotive Standards Committee in the German Institute for
Standardization (in German "Deutsches Institut fur Normung", best
known by the acronym DIN), representing international
standardization interests in the automotive field. The FAKRA
standard provides a system, based on keying and color coding, for
proper connector attachment. Like socket keys can only be connected
to like plug keyways in FAKRA connectors. Secure positioning and
locking of connector housings is facilitated by way of a FAKRA
defined catch on the socket housing and a cooperating latch on the
plug housing.
[0004] The connector assemblies include an inner contact and an
outer contact that provides shielding for the inner contact. The
outer contact is typically manufactured from a zinc die-cast or
screw machined part, which is expensive to manufacture.
[0005] A need remains for a connector assembly that may be
manufactured in a cost effective and reliable manner. Additionally,
a need remains for a connector assembly that may utilize less
expensive parts, such as stamped and formed parts, in existing
outer housings and locks made for die-cast parts.
[0006] The subject matter discussed in the background section
should not be assumed to be prior art merely as a result of its
mention in the background section. Similarly, a problem mentioned
in the background section or associated with the subject matter of
the background section should not be assumed to have been
previously recognized in the prior art. The subject matter in the
background section merely represents different approaches, which in
and of themselves may also be inventions.
BRIEF SUMMARY OF THE INVENTION
[0007] In accordance with an embodiment of the invention, a coaxial
connector assembly is provided. The coaxial connector assembly
includes an inner contact that is configured to terminate a center
conductor of a coaxial cable, an insulative inner sleeve that holds
the inner contact within it and a tubular outer contact that
surrounds the inner sleeve and the inner contact. The outer contact
is configured to terminate a shield braid of the coaxial cable. The
coaxial connector assembly further includes an insulative
cylindrical outer sleeve defining a central cavity that extends
longitudinally therethrough. The outer contact is disposed within
this cavity. The cavity has an opening that is configured to
receive a corresponding coaxial connector. A lip on a forward end
of the outer sleeve extends into the opening such that a forward
edge of the outer contact is not exposed within the opening. This
lip may be angled inwardly toward the opening.
[0008] The outer contact may define a lock tab that radially
protrudes from an outer surface of the outer contact and the outer
sleeve may also define an aperture that extends radially from the
cavity to the outer surface of the outer sleeve in which this lock
tab is received.
[0009] Alternatively, the outer contact may define a pair of lock
tabs. Each lock tab of this pair of lock tabs protrudes from
opposite sides of an outer surface of the outer contact. The outer
sleeve may also define a pair of apertures. Each aperture of the
pair of apertures extends radially from the cavity to the outer
surface through opposite sides of the outer sleeve in which one of
the pair of lock tabs is received.
[0010] The cavity may define a pair of longitudinal slots. Each
slot of the pair of slots extends radially through opposite sides
of the outer sleeve and each slot is intermediate the pair of
apertures. The pair of slots is configured to allow sides of the
outer sleeve to flex outwardly.
[0011] The coaxial connector assembly may further include a
connector housing in which the outer sleeve is received. The
connector housing inhibits the sides of the outer sleeve from
flexing outwardly.
[0012] In accordance with another embodiment of the invention, a
female coaxial connector assembly is provided. The female coaxial
connector assembly includes an inner contact that is configured to
terminate a center conductor of a coaxial cable, an inner sleeve
formed of a first dielectric material and holding the inner
contact, and a tubular outer contact that is formed from a flat
work piece. The outer contact surrounds the inner sleeve and the
inner contact. The outer contact is configured to terminate a
shield braid of the coaxial cable. The female coaxial connector
assembly also includes a cylindrical outer sleeve that is formed of
a second dielectric material. The outer sleeve defines a
longitudinal cavity that extends therethrough. The outer contact is
disposed within this cavity. The cavity has an opening that is
configured to receive a corresponding male coaxial connector. A lip
on a forward end of the outer sleeve is angled inwardly toward the
opening and extends into the opening such that a forward edge of
the outer contact is not exposed within the opening.
[0013] A lock tab may be formed in the flat work piece. The lock
tab radially protrudes from the outer contact. The outer sleeve may
also define an aperture that extends radially from the cavity to
the outer surface of the outer sleeve in which this lock tab is
received.
[0014] Alternatively, a pair of lock tabs may be formed in the flat
work piece. Each lock tab of the pair of lock tabs protrudes from
opposite sides of the outer contact. The outer sleeve may also
define a pair of apertures. Each aperture of the pair of apertures
extends radially from the cavity to the outer surface through
opposite sides of the outer sleeve in which one of the pair of lock
tabs is received. A rearward edge of the lock tab engages a forward
edge of the aperture, thereby inhibiting removal of the outer
contact from the outer sleeve.
[0015] The outer sleeve may define a pair of slots that extend
longitudinally from a rearward flange of the outer sleeve. Each
slot of the pair of slots extends radially through opposite sides
of the outer sleeve. Each slot is located intermediate the pair of
apertures. The pair of slots is configured to allow sides of the
outer sleeve to flex outwardly when a forward surface of the lock
tabs engages the rearward flange of the outer sleeve.
[0016] The female coaxial connector may further include a connector
housing in which the outer sleeve is received. The connector
housing inhibits the sides of the outer sleeve from flexing
outwardly, thereby retaining the pair of lock tabs within the pair
of apertures.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
[0017] The present invention will now be described, by way of
example with reference to the accompanying drawings, in which:
[0018] FIG. 1 is a perspective view of a coaxial connector assembly
according to one embodiment;
[0019] FIG. 2 is an exploded perspective view of the coaxial
connector assembly of FIG. 1 according to one embodiment;
[0020] FIG. 3 is cross sectional side view of the coaxial connector
assembly of FIG. 1 according to one embodiment;
[0021] FIG. 4 is perspective view of an outer sleeve and coaxial
connector of the coaxial connector assembly of FIG. 1 according to
one embodiment;
[0022] FIG. 5 is an assembly process view of the outer sleeve and
coaxial connector according to one embodiment;
[0023] FIG. 6 is an perspective view of the outer sleeve assembled
with the coaxial connector according to one embodiment;
[0024] FIG. 7 is perspective view of a connector housing of the
coaxial connector assembly of FIG. 1 according to one
embodiment;
[0025] FIG. 8A is an alternative perspective view of the coaxial
connector assembly of FIG. 1 according to one embodiment; and.
[0026] FIG. 8B is cross sectional view of the coaxial connector
assembly of FIG. 8A according to one embodiment; and.
[0027] FIG. 9A-9C are rear views of the coaxial connector assembly
of FIG. 1 with the coaxial connector in alternative orientations
relative to the connector housing according to one embodiment.
DETAILED DESCRIPTION OF THE INVENTION
[0028] Presented herein is a description of a coaxial connector
assembly configured to terminate a shielded coaxial cable and
suitable for use in automotive applications.
[0029] FIGS. 1-3 illustrate a non-limiting example of a right
angled female coaxial connector assembly, hereinafter referred to
as the assembly 10. The assembly 10 includes a right angled female
coaxial connector, hereinafter referred to as the coaxial connector
12 that is attached to a coaxial cable 14. The female coaxial
connector includes an inner contact 16 contained within an
insulative inner sleeve 18. The inner contact 16 is configured to
terminate a center conductor 20 of the coaxial cable 14 and provide
contact with an inner contact (not shown) of a corresponding mating
male coaxial connector assembly (not shown). The inner contact 16
may be formed from an electrically conductive material such as
bronze and may be plated, e.g. with nickel, tin, or gold depending
on the area of the inner contact 16. The inner contact 16 is formed
from a single work piece that is stamped and rolled into a
generally tubular shape. One end of the inner contact 16 defines a
first female socket 16a that is configured to receive the male pin
inner contact of the corresponding mating male coaxial connector
assembly. The other end of the inner contact 16 defines a second
socket 16b that is generally oriented ninety degrees relative to
the first socket 16a. The second socket 16b is configured to
receive a male pin terminal 22 attached to the center conductor 20
of the coaxial cable 14. Other embodiments may omit the male pin
terminal and the center conductor 20 of the coaxial cable 14 may be
received directly into the second socket 16b.
[0030] The coaxial connector 12 also includes an outer contact 24
that is configured to hold the inner contact 16 and inner sleeve
18. The outer contact 24 is formed from a flat sheet of
electrically conductive material (not shown) and folded into first
and second barrel sections 24a, 24b that are substantially oriented
at right angles to one another. The outer contact 24 is also formed
from a sheet of an electrically conductive material and also may be
plated. The first barrel section 24a extending longitudinally (e.g.
along an X axis) is configured to receive the inner sleeve 18
containing the inner contact 16. The second barrel section 24b
extending vertically (e.g. along a Z axis) is configured to receive
the coaxial cable 14 and attach to the shield conductor 28 of the
coaxial cable 14 by a tubular ferrule 26 crimped to the outer
contact 24. The outer contact 24 is formed of an electrically
conductive material to provide electrical continuity between the
shield conductor 28 of the coaxial cable 14 and an outer contact
(not shown) of the corresponding mating male coaxial connector
assembly.
[0031] The outer contact 24 is held within an insulative outer
sleeve 30 that snaps into a connector housing 32. This connector
housing 32 is configured to receive a corresponding connector
housing of the mating male coaxial connector assembly. The
connector housing 32 further includes a connector position
assurance (CPA) device 34. This assembly 10 may conforming with the
FAKRA standard.
[0032] FAKRA connectors are radio frequency (RF) connectors that
have an interface that complies with the standard for a uniform
connector system established by the FAKRA automobile expert group.
The FAKRA connectors have a standardized keying system and locking
system that fulfill the high functional and safety requirements of
automotive applications. The FAKRA connectors are based on a
subminiature version B connector (SMB connector) and feature snap
on coupling. FAKRA connectors are designed to provide either 50 Ohm
or 75 ohm impedance. The coaxial connector 12 may utilize other
types of connectors other than the FAKRA connectors described
herein.
[0033] As shown in FIGS. 2 and 3, the outer sleeve 30 defines a
central sleeve cavity 36 that extends longitudinally (i.e. along
the X axis) through the outer sleeve 30 in which the coaxial
connector 12 is disposed. This sleeve cavity 36 has an opening 38
through which the corresponding mating male coaxial connector is
received. As best shown in FIG. 3, a lip 40 on a forward end 42 of
the outer sleeve 30 extends into the opening 38 such that a forward
edge 44 of the outer contact 24 is covered by the lip 40 and is not
exposed within the opening 38. As used herein, forward and rearward
are referenced based on the direction of insertion of the coaxial
connectors one into the other. The lip 40 is angled inwardly toward
the opening 38. This lip 40 guides the outer contact of the
corresponding male coaxial connector into the interior of the outer
contact 24 of the coaxial connector 12 and provides protection for
forward edge 44 of the outer contact 24 from stubbing with a
forward edge of the outer contact of the corresponding male coaxial
connector as the male and female coaxial connectors are mated.
[0034] FIGS. 4-6 illustrate the processes of assembling the outer
sleeve 30 to the coaxial connector 12. As shown in FIG. 4, the
outer contact 24 defines a pair of lock tabs 46 that are formed in
the outer contact 24 by an embossing process. Alternatively, the
lock tabs 46 may be formed by cutting tabs in the side of the outer
contact 24 and bending them outward. Each lock tab 46 protrudes
from opposite sides of an outer surface 48 of the outer contact 24.
A forward surface 46a of each lock tab 46 defines an acute angle
relative to the outer surface 48 of the outer contact 24. A
rearward edge 46b of each lock tab 46 defines surfaces that are
substantially perpendicular to and concentric with the outer
surface 48 of the outer contact 24.
[0035] As further shown in FIG. 4, the outer sleeve 30 defines a
pair of apertures 50 in the side walls 52 of the outer sleeve 30.
Each aperture 50 extends radially from the sleeve cavity 36 through
side walls 52 of the outer sleeve 30, one opposite the other. One
of the lock tabs 46 is received in each of the apertures 50. The
outer sleeve 30 also defines a pair of slots 54 extending
longitudinally (i.e. along the X axis) from the rearward end 56 of
the sleeve. The slots 54 do not extend to the forward end 42 of the
outer sleeve 30. Each of the slots 54 extends radially from the
sleeve cavity 36 through side walls 52 of the outer sleeve 30, one
opposite the other. Each slot 54 is located intermediate the pair
of apertures 50. As shown in FIG. 5, as the coaxial connector 12 is
inserted within the outer sleeve 30, the angled forward surfaces of
the lock tabs 46 contact a rearward end 56 of the outer sleeve 30
and exert an outwardly directed force on the outer sleeve 30. The
slots 54 are configured to allow side walls 52 of the outer sleeve
30 to flex outwardly allowing the lock tab 46 to slide past the
rearward end 56 and enter the aperture 50. When the rearward edge
46b of the lock tabs 46 enter the aperture 50, the side walls 52 of
the outer sleeve 30 flex inwardly to their original position and
the engagement of the rearward edge 46b of the lock tabs 46 with
the outer sleeve 30, as shown in FIG. 6, inhibit removal of the
coaxial connector 12 form the outer sleeve 30.
[0036] The connector housing 32 is illustrated in detail in FIGS.
7-8B. As shown in the figures, the connector housing 32 extends
along the longitudinal (i.e. X axis). The connector housing 32 is
made of a dielectric, preferably polymeric, material. The connector
housing 32 defines a housing cavity 58 (see FIG. 7) that is
configured to receive the outer sleeve 30. As further illustrated
in FIG. 7, the connector housing 32 includes two elastic primary
locking arms 60 arranged in the side walls 52 one opposed to the
other at one of the longitudinal ends of the connector housing 32.
While the example shown here has two locking arms 60, other
embodiments may be envisioned having more or fewer locking
arms.
[0037] As illustrated in FIG. 7, the inner surface 62 of the
housing cavity 58 may define one or more rigid nibs 64 that serve
as secondary locking features. The nibs 64 may or may not be
arranged uniformly around the periphery of the housing cavity 58.
The nibs 64 in the illustrated example are arranged in the vicinity
of or at the same longitudinal end of the connector housing 32 as
the primary locking arms 60.
[0038] Referring once again to FIG. 6, the outer sleeve 30 defines
an interrupted forward split flange 66 located forward of the
apertures 50 and a rearward split flange 68 located rearward of the
apertures 50.
[0039] As illustrated in FIGS. 8A and 8B, the outer sleeve 30 with
the coaxial connector 12 and coaxial cable 14 is inserted into the
housing cavity 58. As shown in FIG. 8B, the coaxial connector 12
and coaxial cable 14 is in the 12 o'clock position. In this
orientation, the nibs 64 are able to pass through the interruptions
70 in the forward flange 66. Once fully inserted into the housing
cavity 58, the side walls 52 of the outer sleeve 30 is in near
contact with the inner surface 62 of the housing cavity 58,
inhibiting outward movement of the outer sleeve 30 and securing the
lock tabs 46 within the apertures 50. The primary locking arms 60
also engage the forward flange 66 inhibiting removal of the outer
sleeve 30 from the housing cavity 58. Once the outer sleeve 30 is
fully inserted into the housing cavity 58, the user may rotate the
outer sleeve 30 as shown in FIGS. 9A-9C. When the coaxial connector
12 and coaxial cable 14 is rotated from the 12 o'clock position to
another position, such as 3 o'clock, 6 o'clock or 9 o'clock, the
nibs 64 engage the forward flange 66 also inhibiting removal of the
outer sleeve 30 from the housing cavity 58. The rearward flange 68
is the same size as the forward flange 66. The rearward flange
stops on the rear of the nibs 64 to provide the proper location.
Both outside circumferential surfaces of the flanges interact with
the inner surface 62 of the housing cavity 58 to limit the
movement/wobble of the outer sleeve 30 with respect to the housing
32. The rearward flange 68 contacts the connector housing 32 as the
outer sleeve 30 is inserted within the housing cavity 58 and
provides proper location of the outer sleeve 30 within the housing
cavity 58.
[0040] While the assembly 10 in the illustrated example is a right
angle or 90.degree. configuration between the coaxial cable 14 and
the outer and inner contacts, other embodiments may be envisioned
in which the coaxial connector is in a straight or 180.degree.
configuration or is in any other angular confirmation.
[0041] Further, while the assembly 10 shown herein is referred to
as a female coaxial connector assembly because it includes a female
socket inner contact 16, other embodiments may be envisioned in
which the assembly 10 includes a male pin inner contact.
[0042] Accordingly, a coaxial connector assembly 10 is provided.
The assembly 10 includes an outer sleeve 30 that holds a coaxial
connector 12 within a connector housing 32. This outer sleeve 30
has a lip 40 at the forward end 42 that guides an outer contact of
a mating coaxial connector into the outer contact 24 of the coaxial
connector 12. The lip 40 also covers the forward edge 44 of the
outer contact 24 of the coaxial connector 12 which prevents
stubbing (i.e. butting contact) of the outer contacts as they are
mated. The connector housing 32 also includes primary and secondary
locking features to secure the outer sleeve 30 holding the coaxial
connector 12 within the connector housing 32. This assembly 10 may
be configured to meet the FAKRA connector standards.
[0043] While this invention has been described in terms of the
preferred embodiments thereof, it is not intended to be so limited,
but rather only to the extent set forth in the claims that follow.
Moreover, the use of the terms first, second, primary secondary,
etc. does not denote any order of importance, but rather the terms
first, second, etc. are used to distinguish one element from
another. Furthermore, the use of the terms a, an, etc. do not
denote a limitation of quantity, but rather denote the presence of
at least one of the referenced items.
* * * * *